Diversity of Bacterial Photosymbionts in Lubomirskiidae Sponges from Lake Baikal

Figure 2

Phylogenetic tree of cyanobacteria associated with photosynthetic sponges from Lake Baikal inferred from 522 nucleotide positions of the 16S rRNA gene. Sequences from this study and reference sequences of S. rubescens and C. gracile are shown in bold. Bayesian posterior probability (%) is shown at the nodes. Scale bar represents 0.2 substitutions per site. GenBank accession numbers are given in the parentheses. Accession numbers for 6 sequences from sponges and water, Baikal: JX570937, JX570945, JX570948, KF856235, KF856236, and KF856237; 23 sequences from sponges and water, Baikal: JX570939, JX570957–JX570966, KF856238–KF856242, and uncultured bacterium (Pyrenean, Tibetan, Mongolian lakes): HE857287, HE857263, HM129960, DQ297463, DQ422951, DQ297460, and DQ297461. In the Bayesian analysis, the MCMC chain was run for 2,000,000, sampled every 100th step.